The day that filming began, a forest fire broke out nearby. The production persuaded the rescue authorities to allow them to film some of the helicopter action taking place.
The blood on the apartment walls and its means of getting there is based on a real case.
The minor league baseball player mentioned plays for the "Blasters", a team which does not exist. The Las Vegas minor league team was originally the Stars, and is now known as the "51s", as in "Area 51."